Metallurgical reactor for the treatment under reduced pressure o

Details Metallurgical reactor for the treatment under reduced pressure o Metallurgical reactor for the treatment under reduced pressure o

1998-12-09

2000-12-19

Kastler, Scott

Metallurgical apparatus

Means for melting or vaporizing metal or treating liquefied...

By providing, treating or protecting environment, e.g., vacuum

266217, C21C 710

Patent

active

061623881

ABSTRACT:
The invention relates to a metallurgical reactor for the treatment under reduced pressure of a liquid metal (1) such as steel, contained in a ladle (2), of the type comprising a chamber (25), connected to a gas-suction plant (30) which can maintain a reduced pressure therein, and two tubular snorkels (26, 27), the upper ends of which emerge in orifices (35, 36) made in the bottom (28) of the chamber (25) and the lower ends of which may be immersed in said liquid metal (1) contained in said ladle (2), one (26) of said snorkels, called the "ascending snorkel", having means (29) for injecting a gas into its internal space for the purpose of creating a circulatory motion in the liquid metal (1) between the ladle (2) and the chamber (25) during said treatment, the reactor also comprising an enclosure (17) which is provided with means (20) for injecting a gas into its internal space, these means being suitable for creating a pressure greater than atmospheric pressure in the enclosure (17), and the ladle (2) being placed in the latter, the upper edge (23) of said enclosure being designed to support the bottom (28) of the chamber (25) in a sealed manner during said treatment, and means (18, 19) for raising the ladle (2) toward the chamber (25) during said treatment.

REFERENCES:
patent: 3022059 (1962-02-01), Harders
patent: 3798025 (1974-03-01), Ramachandran et al.
patent: 3820767 (1974-06-01), Metz
patent: 4298376 (1981-11-01), Narita et al.
French Search Report Sep. 1998.

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